I had this done in February. I was put under in the hospital, because during the preliminary procedure to check the uterus for fibroids (for the life of me, I can't remember the name of it!), the pain was very intense, and it was decided that putting me out for the ablation would be best. I was glad, and have heard that if you have the option, do choose to be put under for the procedure.
That said, complete recover lasted about one month, the painful cramping only lasted about 2 days, I just could not ditch the pantiliner for one month. Since then, nothing by way of a period, yippee!
What the doctors forget to mention, though, is that you will still ovulate, and you will still have PMS, you just won't have the period as it was before. So, while my bad periods are over, the painful ovulation and bad PMS are still present, but I am not miserable for as long as I was before.
Either way, I am glad I had the procedure done, but do remember, when you are told to take it easy for a couple of days, do so, no matter if you feel better, because sudden movements can still feel bad (at times, I felt as if a scab in my uterus was being ripped and pulled when I would stretch and turn, so avoid that if possible! sorry if TMI!). After a month or so, you will feel wonderful!